Full Technical Description: Threaded Type; Aluminum Material; Epoxy Powder Coated Finish; Threaded Metal Conduit Used on; UL Approval; Class I Group B C D, Class II Group E F G, Class III Enclosure; 3 Inch Trade Size; Recessed Head Style; UNILET[R] Brand; Applicable Standard NEC 501-4A/501-4B; PLG Model